40 um paraffin sections coming loose from the slides

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=?Windows-1252?Q?Susanne_S=F8rensen?=

Hi Everyone
I'm cutting 40 um paraffin sections, human brain, so the sections is very big. The problem is, that some sections (to much) is coming loose from the slides when I rehydrate. I coated the slides with 4,5% gelatine and 4,0% potassium chromic sulphate. I have tried silane slides but the gelatine/ChromeAlun seems to be the best for now.
If anyone has a suggestion to overcome the problem with loose section, I would like to here from you.
Thanks
Sus Sørensen
Research Lab Stereology & Neuroscience
Denmark
susr@city.dk